PROTOCOL OUTLINE: This is a multicenter study. Patients receive oral prednisone on days 0-10. Beginning on day 1, patients undergoing autologous peripheral blood stem cell (PBSC) transplantation receive filgrastim (G-CSF) subcutaneously daily until leukapheresis is completed. Leukapheresis begins on approximately day 4 and continues until adequate CD34+ PBSC are collected.